Blowing smoke again...

I got a B16a Gen. 2 in a 92 Civic CX. Well, for the past months or so it has been blowing black smoke out of the exhaust (in mid to high range rpm) , and getting all over my back bumper. I took it to a local shop for them to see if it is throwing a code, but they can't find where to hook up the device to even get the codes. When I did the engine swap we had to use the stock wiring harness b/c the one it came with did not fit right. Anything can help, thank you.

Well the guy at the shop said my car threw a code 7. Which has something to do with the throttle. Does that sound like the problem? I though I if I were running rich it would do it in any rpm, but my is only doing it in mid to high rpms. Well what ever...

Well if your running rich it will blow black at any rpm, but more so at the higher rpm. If you really aren't sure get a code reader or take it to honda, e-tests will help to since it shows you what's coming out.

I went to the shop and they got a code 7. Which is throttle position sensor. I'm getting a new throttle body Monday. Now, my car died three times on the way home (at an idle). I'm thinking it's my throttle not idling right (not the sensor). But I'll see Monday.

No, it was how the man at the shop was explaining it. He said I need a new throttle body and he said nothing about senor being bad. Sooo I thought it had to do with the throttle body... sorry for the confusion. So he replaced the sensor and not the throttle body and now it's fixed!